1. New horizons;Cousins,1980
2. Selective spinal analgesia;Cousins;Lancet,1979
3. Intrathecal and epidural administration of opioids;Cousins;Anesthesiology,1984
4. Psychogenic pain and the pain-prone patient;Engel;Amer. J. Med.,1959
5. The sick-role and chronic pain;Gallagher,1982